Viewing Cassandra データ in RAD Studio Data Explorer

How to view Cassandra データ in RAD Studio Data Explorer using the CData ODBC Driver for Cassandra.

最終更新日：2023-06-12

Embarcadero RAD Studio provides a development environment for Delphi and C++Builder applications. With the CData ODBC Driver for Cassandra, you gain access to live Cassandra データ within RAD Studio, abstracting the data into tables, views, and stored procedures that can be used to both retrieve and update Cassandra データ. This article will walk through connecting to Cassandra using the Data Explorer.

Configure a Connection to Cassandra

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Cassandra 接続プロパティの取得・設定方法

Cassandra への接続には、Server、Port、Database を接続プロパティとして設定します。追加で、内部認証を使う場合には、User、Password を接続プロパティに設定します。

Connecting to Cassandra データ Using Data Explorer

You can create a simple application for displaying Cassandra データ by utilizing the CData FireDAC Components for Cassandra and a new VCL Forms Application:

Open the Data Explorer in RAD Studio and expand FireDAC.
Right-click the ODBC Data Source node in the Data Explorer.
Click Add New Connection.
Enter a name for the connection.
In the FireDAC Connection Editor that appears, set the DataSource property to the name of the ODBC DSN for Cassandra.
Back in the Data Explorer, expand the tables for the connection.
Create a new VCL Forms application and drag a table (for example: Customer) onto the form.
Select the CustomerTable object on the form and set the Active property to true.
Right-click on the object, bind visually, and link everything (*) to a new control (TStringGrid).
Arrange the TStringGrid on the form and run the application to see the Customer data.